1756-A7 | Allen Bradley | ControlLogix 7-Slot Chassis

Product Description

The Allen Bradley 1756-A7 is a seven-slot chassis designed for the ControlLogix platform. It provides the mechanical and electrical framework to house modules, ensuring reliable backplane communication and stable operation in industrial automation systems. With robust current handling, flexible mounting options, and wide operating temperature ranges, this chassis is engineered for dependable performance in demanding environments.

Technical Specifications

• Manufacturer: Allen Bradley

• Category: PLCs

• Product Line: ControlLogix

• Part Number: 1756-A7

• Weight: 2.06 lbs (0.94 kg)

• Module Type: Chassis

• Number of Slots: 7 slots

• Mounting: Panel mount installation

• Orientation: Horizontal

• Number of Mounting Tabs: 4

• Enclosure Type: Open frame

• Backplane Current (1.2 VDC): 1.5 A

• Backplane Current (3.3 VDC): 4 A per chassis / 4 A per slot

• Backplane Current (5.1 VDC): 15 A per chassis / 6 A per slot

• Backplane Current (24 VDC): 2.8 A per chassis / 2.8 A per slot

• Backplane Current (5 VDC): 10 A

• Backplane Current (24 VDC): 2.8 A

• Power Dissipation (Max): 4.5 W

• Operating Temperature (Series B): 0–60 °C (32–140 °F)

• Operating Temperature (Series C): −25–60 °C (−13–140 °F)

• Storage Temperature: −40–85 °C (−40–185 °F)

• Cabinet Size (HxWxD, Min): 50.8 × 60.9 × 20.3 cm (20 × 24 × 8 in.)

Application Scenarios

• Designed for ControlLogix systems requiring modular expansion

• Suitable for large-scale automation projects with multiple I/O modules

• Provides stable backplane communication for high-performance controllers

FAQ

Q: How many slots does the 1756-A7 chassis provide?  A: It supports seven module slots.

Q: What is the recommended mounting method?  A: The chassis is designed for panel mounting in a horizontal orientation.

Q: What is the maximum operating temperature range?  A: Series C supports −25 to +60 °C, while Series B supports 0 to +60 °C.

Comparison with Similar Models

• 1756-A7: Seven-slot chassis, compact size, panel mount

• 1756-A10: Ten-slot chassis, larger capacity for expanded systems

• 1756-A13: Thirteen-slot chassis, maximum expansion option